Closure device

Abstract

A closure device having first and second fastening strips arranged to be interlocked over a predetermined length is provided. Each of said first and second fastening strips includes first and second closure elements separated by an intermediate area, wherein the first closure element on the first fastening strip is arranged to be interlocked over a predetermined length with the first closure element on the second fastening strip, and the second closure element on the first fastening strip is arranged to be interlocked over a predetermined length with the second closure element on the second fastening strip. Each of the closure elements may be colored with a colorant. For example, the closure elements on one fastening strip may be colored with an opaque pigment, and the intermediate area on that fastening strip may colored with a first translucent pigment. The closure elements on the other fastening strip may be colored with a translucent pigment, and the intermediate area on that fastening strip may be colored with a second opaque pigment. When the closure device is occluded, the colors of the first and second pigments combine to cause a change in color. The change in color may be observed from either side of the closure device.

1. A closure device comprising first and second fastening strips arranged to be interlocked over a predetermined length, said first fastening strip includes first and second closure elements, said second fastening strip includes first and second closure elements, said first closure element on said first fastening strip is arranged to be interlocked over a predetermined length with said first closure element on said second fastening strip, said second closure element on said first fastening strip is arranged to be interlocked over a predetermined length with said second closure element on said second fastening strip,
 said first closure element on said first fastening strip is of a first color, said second closure element on said first fastening strip is of a second color, said first closure element on said second fastening strip is of a third color, said second closure element on said second fastening strip is of a fourth color, whereby, when said first closure element on said first fastening strip interlocks with said first closure element on said second fastening strip, said first and third colors produce a fifth color and whereby, when said second closure element on said first fastening strip interlocks with said second closure element on said second fastening strip, said second and fourth colors produce a sixth color, 
 said first and second closure elements on said first fastening strip are separated by a first intermediate area, said first and second closure elements on said second fastening strip are separated by a second intermediate area, said first intermediate area is a seventh color and said second intermediate area is an eighth color. 
 
     
     
       2. The invention according to  claim 1  wherein said seventh color and said eighth color are transparent. 
     
     
       3. The invention according to  claim 2  wherein said seventh color and said eighth color are non-colored transparent. 
     
     
       4. The invention according to  claim 1  wherein said seventh color is transparent and said eighth color is white. 
     
     
       5. The invention according to  claim 4  wherein said seventh color is non-colored transparent. 
     
     
       6. The invention according to  claim 1  wherein said seventh color and said eighth color produce a ninth color. 
     
     
       7. The invention according to  claim 6  wherein said third, fourth, and seventh colors are identical, said first, second, and eighth colors are identical and said fifth, sixth and ninth colors are identical. 
     
     
       8. The invention according to  claim 7  wherein said third, fourth, and seventh colors are opaque yellow, said first, second, and eighth colors are translucent blue, and said fifth, sixth and ninth colors are green. 
     
     
       9. The invention according to  claim 1  wherein said first and second colors are identical, said third and fourth colors are identical, and said fifth and sixth colors are identical. 
     
     
       10. The invention according to  claim 9  wherein said first and second colors are yellow, said third and fourth colors are blue, and said filth and sixth colors are green. 
     
     
       11. The invention according to  claim 10  wherein said first and second colors are opaque yellow, said third and fourth colors are translucent blue, said seventh color is transparent and said eighth color is transparent. 
     
     
       12. The invention according to  claim 11  wherein said seventh color and said eighth color are non-colored transparent. 
     
     
       13. The invention according to  claim 10  wherein said first and second colors are opaque yellow, said third and fourth colors are translucent blue, said seventh color is transparent and said eighth color is white. 
     
     
       14. The invention according to  claim 13  wherein said seventh color is non-colored transparent. 
     
     
       15. The invention according to  claim 1  wherein said first and second closure elements on said first fastening strip are male closure elements and said first and second closure elements on said second fastening strip are female closure elements. 
     
     
       16. The invention according to  claim 15  wherein said first and second closure elements on said first fastening strip are arrowhead closure elements. 
     
     
       17. The invention according to  claim 15  wherein said first and second closure elements on said first fastening strip are U-channel closure elements. 
     
     
       18. A container comprising first and second sidewalls, said first and second sidewalls including mating first and second fastening strips respectively, each of said first and second fastening strips includes first and second closure elements, said first closure element on said first fastening strip is arranged to be interlocked over a predetermined length with said first closure element on said second fastening strip, said second closure element on said first fastening strip is arranged to be interlocked over a predetermined length wit said second closure element on said second fastening strip
 said first closure element on said first fastening strip is of a first color, said second closure element on said first fastening strip is of a second color, said first closure element on said second fastening strip is of a third color, said second closure element on said second fastening strip is of a fourth color, whereby, when said first closure element on said first fastening strip interlocks with said first closure element on said second fastening strip, said first and third colors produce a fifth color and whereby, when said second closure element on said first fastening strip interlocks with said second closure element on said second fastening strip, said second and fourth colors produce a sixth color 
 said first and second closure elements on said first fastening strip are separated by a first intermediate area, said first and second closure elements on said second fastening strip are separated by a second intermediate area, said first intermediate area is a seventh color and said second intermediate area is an eighth color. 
 
     
     
       19. The invention according to  claim 18  wherein said seventh color and said eighth color are transparent. 
     
     
       20. The invention according to  claim 19  wherein said seventh color and said eight color are non-colored transparent. 
     
     
       21. The invention according to  claim 18  wherein said seventh color is transparent and said eight color is white. 
     
     
       22. The invention according to  claim 21  wherein said seventh color is non-colored transparent. 
     
     
       23. The invention according to  claim 18  wherein said seventh color and said eighth color produce a ninth color. 
     
     
       24. The invention according to  claim 23  wherein said third, fourth, and seventh colors are identical, said first, second, and eighth colors are identical and said fifth, sixth and ninth colors are identical. 
     
     
       25. The invention according to  claim 24  wherein said third, fourth, and seventh colors are opaque yellow, said first, second, and eighth colors are translucent blue, and said fifth, sixth and ninth colors are green. 
     
     
       26. The invention according to  claim 18  wherein said first and second colors are identical, said third and fourth colors are identical, and said fifth and sixth colors are identical. 
     
     
       27. The invention according to  claim 26  wherein said first and second colors are yellow, said third and fourth colors are blue, and said fifth and sixth colors are green. 
     
     
       28. The invention according to  claim 27  wherein said fist and second colors are opaque yellow, said third and fourth colors are translucent blue, said seventh color is transparent and said eighth color is transparent. 
     
     
       29. The invention according to  claim 28  wherein said seventh color and said eight color are non-colored transparent. 
     
     
       30. The invention according to  claim 27  wherein said first and second colors are opaque yellow, said third and fourth colors are translucent blue, said seventh color is transparent and said eight color is white. 
     
     
       31. The invention according to  claim 30  wherein said seventh color is non-colored transparent. 
     
     
       32. The invention according to  claim 18  wherein said first and second closure elements on said first fastening strip are male closure elements and said first and second closure elements on said second fastening strip are female closure elements. 
     
     
       33. The invention according to  claim 32  wherein said first and second closure elements on said first fastening strip are arrowhead closure elements. 
     
     
       34. The invention according to  claim 32  wherein said first and second closure elements on said first fastening strip are U-channel closure elements.